| GO26ONE Ltd | Administrative & support | 2014 |
| Goddard Auto Repairs Limited | Wholesale & retail | 2022 |
| Godwin Property Limited | Real estate | 2022 |
| Gofal Health Care Limited | Health & social care | 2003 |
| Goggis Cuisine Limited | Hospitality | 2014 |
| Gold Melt Limited | Financial services | 2026 |
| Gold Reserves Limited | Wholesale & retail | 1992 |
| Gold Services (SW) Ltd | Construction | 2013 |
| Gold Wolf Projects Limited | Real estate | 2024 |
| Goldangel Limited | Extraterritorial | 2000 |
| Goldeal Limited | Construction | 2016 |
| Golden 8RE Ltd | Hospitality | 2017 |
| Golden Bolts Investments Ltd | Real estate | 2022 |
| Golden Carriage Catering Ltd | Hospitality | 2025 |
| Golden Curry Restaurant Limited(The) | Hospitality | 1986 |
| Golden Dragon 2501 Ltd | Hospitality | 2025 |
| Golden Fish Food Ltd | Hospitality | 2024 |
| Golden Hill Ventures Ltd | Hospitality | 2018 |
| Golden House (Morriston) Limited | Hospitality | 2017 |
| Golden Key MC Limited | Administrative & support | 2026 |
| Golden Leaf Investments Ltd | Real estate | 2024 |
| Golden Leaf Property Ltd. | Real estate | 2017 |
| Golden Rock Cultural Exchange Ltd | Wholesale & retail | 2010 |
| Golden Swan Chinese Ltd | Hospitality | 2022 |
| Goldenpine UK Ltd | Extraterritorial | 2008 |
| Goldsound Limited | Professional & scientific | 1988 |
| Goldstone Consultancy Limited | Information & communication | 2000 |
| Goleudy Housing and Support Limited | Health & social care | 1975 |
| Golgene Technologies Limited | Professional & scientific | 2007 |
| Golwg Y Garreg LAS Management Company Ltd | Households | 2024 |
| Good Financial Advice Limited | Financial services | 2020 |
| Good for YOU Ferments Ltd | Manufacturing | 2020 |
| Good Housekeeping Wales Ltd | Administrative & support | 2017 |
| Good Morning Vietnam Limited | Hospitality | 2025 |
| Good News (Morriston) Limited | Wholesale & retail | 2021 |
| Good Office Space Limited | Real estate | 2024 |
| Good Topco Limited | Financial services | 2024 |
| Good With Words Ltd | Administrative & support | 2010 |
| Goodcross Limited | Real estate | 1994 |
| GOODHOME2011 Limited | Wholesale & retail | 2025 |
| Goodnews Swansea Limited | Wholesale & retail | 2005 |
| Goodpulse Limited | Hospitality | 1991 |
| Googoo Enterprise Limited | Hospitality | 2018 |
| Goose Island Limited | Wholesale & retail | 2012 |
| Gordav Ltd | Health & social care | 2023 |
| Gordon Down & Company Limited | Professional & scientific | 2003 |
| Gordon's Fine Foods Limited | Wholesale & retail | 2014 |
| Gorilla 19 Construction & Civil Engineering Ltd | Construction | 2016 |
| Gorilla Lifting Ltd | Administrative & support | 2025 |
| Gorman Glass Limited | Construction | 1976 |
| Gors Beanos Ltd | Hospitality | 2022 |
| Gors Garage Services Limited | Wholesale & retail | 2021 |
| Gors Supermarket Ltd | Wholesale & retail | 2013 |
| Gorse Hair Limited | Other services | 2019 |
| Gorseinon Body Repairs Ltd | Wholesale & retail | 2025 |
| Gorseinon Cleaning Services Ltd | Administrative & support | 2024 |
| Gorseinon EYE Centre Limited | Health & social care | 2013 |
| Gorseinon Hand Car Wash Ltd | Other services | 2023 |
| Gorseinon Launderette Ltd | Other services | 2025 |
| Gorseinon Limited | Administrative & support | 2023 |
| Gorseinon Tyre & Service Centre Ltd | Manufacturing | 2013 |
| Gorsllan Ltd | Agriculture & fishing | 1999 |
| Gorvett Courier and Services Limited | Transport & logistics | 2012 |
| Gorwelion Consulting Services Limited | Information & communication | 2016 |
| Goshawk Road Residents Company Limited | Households | 2008 |
| Gosney Electrical Limited | Construction | 2025 |
| Gothic Bridal Ltd | Wholesale & retail | 2024 |
| Gould MOT Services Limited | Wholesale & retail | 2025 |
| Gourmet Plate Ltd | Hospitality | 2024 |
| Gouzier Global Ltd | Wholesale & retail | 2025 |
| GOV Grant Check Ltd | Other services | 2023 |
| Governaity Technologies Ltd | Information & communication | 2025 |
| Gower Accountancy & Tax Advisory Services Ltd | Professional & scientific | 2018 |
| Gower Aluminium Ltd | Manufacturing | 2022 |
| Gower Auto Limited | Wholesale & retail | 2008 |
| Gower Bar Hire Ltd | Hospitality | 2024 |
| Gower Bathrooms Ltd | Construction | 2013 |
| Gower Beach Breaks Ltd | Hospitality | 2022 |
| Gower Beat Collective Ltd | Arts & recreation | 2026 |
| Gower Bespoke Fabrication Ltd | Manufacturing | 2020 |
| Gower Blinds Limited | Wholesale & retail | 2018 |
| Gower Brewery Co Limited | Manufacturing | 2011 |
| Gower Brewing Company Ltd. | Hospitality | 2011 |
| Gower Building Services Limited | Construction | 2024 |
| Gower Business Systems Ltd. | Information & communication | 1990 |
| Gower Cabs Ltd | Transport & logistics | 2025 |
| Gower Capital 2 Ltd | Construction | 2021 |
| Gower Capital Group Ltd | Construction | 2015 |
| Gower Caravan Storage Limited | Transport & logistics | 2004 |
| Gower Carpet Cleaning Company Ltd | Administrative & support | 2022 |
| Gower Cheese Limited | Manufacturing | 2023 |
| Gower Chemicals Limited | Manufacturing | 1978 |
| Gower CIB Ltd | Manufacturing | 2023 |
| Gower Climbing Festival CIC | Arts & recreation | 2026 |
| Gower Coast Adventures Limited | Administrative & support | 2003 |
| Gower Coast Cabins Ltd | Hospitality | 2018 |
| Gower Coast Fitness Ltd | Arts & recreation | 2021 |
| Gower Coast IT Solutions Ltd | Information & communication | 2015 |
| Gower Coast Kitchens Ltd | Wholesale & retail | 2021 |
| Gower Coast Landscape Designs Limited | Professional & scientific | 2023 |